GitLab

Specifically removing:
 - callGlobalWithSavedArgs() and CallGlobalAction class
 - makeAndRegisterMockGlobals(), makeAndRegisterMockApis()
 - registerMockGlobal() and registerMockGlobals()
 - registerMockApi() and registerMockApis()
 - overrideGlobal(), globalOverrides and mockGlobals variables

Also removing an export for registerMockMessageCallbacks, since
this function is only used within test_api.js

Bug: 844820
Change-Id: I958123de5077fc408c3ddab687fbe31a37de0d27
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1637984
Auto-Submit: Demetrios Papadopoulos <dpapad@chromium.org>
Commit-Queue: Rebekah Potter <rbpotter@chromium.org>
Reviewed-by: Rebekah Potter <rbpotter@chromium.org>
Cr-Commit-Position: refs/heads/master@{#665265}